The engraving on my rifle is said to be by Kornbrath but I am no expert on engraving. The gun is also rather beat up and the TG & FP may have been refinished at some time which makes the engraving look funny. I think I have seen the bear with two cubs on another rifle that was described as Kornbrath.
As for the wood, I'm pretty sure it is American walnut, I will take a picture of the butt end which is fancy grained. The forend sure looks American. The checkering pattern is very plain and without the hump at the comb and I only have one other Sman '03 without the hump and that is the full stocked one and I consider those two to be some of his earliest guns. The Ross Sman rifle also is without the hump.